Progressive dyspnea in patient with large mediastinal mass.

[well-differentiated liposarcoma]

Liposarcoma occurs very rarely in the mediastinum . Patients often remain asymptomatic until it grows large enough to cause direct invasion or compression of adjacent organs . We report a case of a 77 -year -old male presented with dyspnea of exertion and was found to have a large mediastinal mass which was eventually diagnosed as primary mediastinal well-differentiated liposarcoma . The limited respiratory function at the initial presentation prompted phrenic nerve preserving incomplete resection rather than radical removal of the adjacent mediastinal structures . After surgical removal , the recurrence for well-differentiated mediastinal liposarcomas in the mediastinum is unknown ; therefore , close follow-up is crucial .